May 31, 2023

FOR IMMEDIATE RELEASE

CHICAGO - The latest versions of two AISC seismic standards, AISC Seismic Provisions for Structural Steel Buildings (ANSI/AISC 341-22) and AISC Prequalified Connections for Special and Intermediate Steel Moment Frames for Seismic Applications (ANSI/AISC 358-22), are now available. 

The documents and accompanying commentary can be downloaded for free at aisc.org/standards.

Both documents will be printed in and provide the basis for the guidelines in the forthcoming 4th edition Seismic Design Manual, which is currently scheduled for publication next year.

Seismic Provisions for Structural Steel Buildings (ANSI/AISC 341-22)

The AISC Committee on Specifications, a consensus body of expert volunteers, developed and approved the revisions. 

"The 2022 AISC Seismic Provisions reflect the latest research and thinking by the AISC Committee on Specifications in the area of seismic design," said James Malley, chair of the AISC Committee on Specifications and a senior principal at Degenkolb Engineers. "The 2022 update notably includes a new structural system: concrete-filled coupled composite plate shear walls (commonly known as SpeedCore). It also features a new appendix titled ‘Design Verification Using Nonlinear Response History Analysis.’ We are excited to bring these new provisions to the structural steel industry."

Prequalified Connections for Special and Intermediate Steel Moment Frames for Seismic Applications (ANSI/AISC 358-22)

The Connection Prequalification Review Panel developed and approved the latest revisions.

"Major updates include the addition of a new connection (the DuraFuse Frames Moment Connection) as well as expansion of the prequalification limitations on the RBS connection to permit deeper and heavier beams and deeper columns," said Jim Swanson, chair of the Connection Prequalification Review Panel and associate professor at the University of Cincinnati. "Additional changes further improve consistency and ease of use, including the consolidation of provisions related to the isolation of the concrete slab from the steel connection material, updated bolt-hole dimensions that are consistent with AISC 360, and adoption of a common check for the beam net-section in the Bolted Flange Plate, Cast Bolted Bracket, and Double Tee chapters."